VERFAHREN ZUR ENTFERNUNG VON THIOSULFAT

Thiosulphate is removed from solns. contg. sulphur dioxide by (i) adjusting to pH3.8-4.2 and heating at 80-100 deg.C. Step 1 is complete when all polythionates are decomposed to thiosulphate. (ii) adjusting to pH1-2 and heating at 102-105 deg.C. Stream of inert gas or superheated steam (at 110-140 d...

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Hauptverfasser:	BUNTHOFF, KLAUS, LOWICKI, NORBERT, NIES, HELMUT, DRIEMEL, KLAUS
Format:	Patent
Sprache:	ger
Schlagworte:	CHEMISTRY COMPOUNDS THEREOF INORGANIC CHEMISTRY METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL SEPARATION TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	Thiosulphate is removed from solns. contg. sulphur dioxide by (i) adjusting to pH3.8-4.2 and heating at 80-100 deg.C. Step 1 is complete when all polythionates are decomposed to thiosulphate. (ii) adjusting to pH1-2 and heating at 102-105 deg.C. Stream of inert gas or superheated steam (at 110-140 deg.C) may be passed through mixt. during step 2. Step 2 is complete when all thiosulphate has decomposed.